/Engine/Source/Runtime/Core/Public/Math/UnrealMathUtility.h
Note: Since IEEE 754 floating point operations are guaranteed to be exact to 0.5 ULP, a value of 4 ought to be sufficient for all but the most complex float operations.
true if the two values are nearly equal.
static bool IsNearlyEqualByULP ( double A, double B, int32 MaxUlps )